nixpkgs/pkgs/development/compilers/openjdk/005_enable-infinality.patch

This patch was downloaded from https://aur.archlinux.org/cgit/aur.git/tree/?h=java8-openjdk
More info can be found at http://www.infinality.net/forum/viewtopic.php?f=2&t=275
diff -ur a/jdk/src/share/native/sun/font/freetypeScaler.c b/jdk/src/share/native/sun/font/freetypeScaler.c
--- a/jdk/src/share/native/sun/font/freetypeScaler.c	2014-09-14 16:28:06.108295959 +0200
+++ b/jdk/src/share/native/sun/font/freetypeScaler.c	2014-09-14 16:28:45.569693174 +0200
@@ -23,6 +23,9 @@
  * questions.
  */

+/* Use Infinality patches as default */
+#define INFINALITY
+
 #include "jni.h"
 #include "jni_util.h"
 #include "jlong.h"
@@ -38,6 +41,10 @@
 #include FT_SIZES_H
 #include FT_OUTLINE_H
 #include FT_SYNTHESIS_H
+#ifdef INFINALITY
+#include FT_LCD_FILTER_H
+#include <fontconfig/fontconfig.h>
+#endif

 #include "fontscaler.h"

@@ -676,6 +683,147 @@ static void CopyFTSubpixelVToSubpixel(co
     }
 }

+#ifdef INFINALITY
+typedef struct {
+    FT_Render_Mode ftRenderMode;
+    int ftLoadFlags;
+    FT_LcdFilter ftLcdFilter;
+} RenderingProperties;
+
+static FcPattern* matchedPattern(const FcChar8* family, double ptSize) {
+    /*
+      we will create pattern to find our family and size in
+      fontconfig configuration, and then will return it's
+      properties:
+    */
+    FcPattern* fcPattern = 0;
+    fcPattern = FcPatternCreate();
+    FcValue fcValue;
+    fcValue.type = FcTypeString;
+    fcValue.u.s = family;
+    FcPatternAdd(fcPattern, FC_FAMILY, fcValue, FcTrue);
+    FcPatternAddBool(fcPattern, FC_SCALABLE, FcTrue);
+    FcPatternAddDouble(fcPattern, FC_SIZE, ptSize);
+    // TODO FcPatternAddInteger(pattern, FC_WEIGHT, weight_value);
+    // TODO FcPatternAddInteger(pattern, FC_SLANT, slant_value);
+    // TODO FcPatternAddDouble(pattern, FC_PIXEL_SIZE, size_value);
+    // TODO FcPatternAddInteger(pattern, FC_WIDTH, stretch); 100 in most cases
+    FcConfigSubstitute(0, fcPattern, FcMatchPattern);
+    FcConfigSubstitute(0, fcPattern, FcMatchFont);
+    FcDefaultSubstitute(fcPattern);
+    FcResult res;
+
+    FcPattern *pattern = 0;
+    pattern = FcFontMatch(0, fcPattern, &res);
+    FcPatternDestroy(fcPattern);
+    return pattern;
+}
+
+static void readFontconfig(const FcChar8* family, double ptSize, jint aaType, RenderingProperties* rp) {
+
+    FcPattern *pattern = matchedPattern(family, ptSize);
+
+    int ftLoadFalgs = FT_LOAD_DEFAULT;
+    FT_Render_Mode ftRenderMode;
+    FT_LcdFilter ftLcdFilter;
+    char horizontal = 1;
+    FcBool b;
+
+    // subpixel order:
+    if (aaType == TEXT_AA_ON)
+        ftRenderMode = FT_RENDER_MODE_NORMAL;
+    else if (aaType == TEXT_AA_OFF)
+        ftRenderMode = FT_RENDER_MODE_MONO;
+    else if (FcPatternGetBool(pattern, FC_ANTIALIAS, 0, &b) == FcResultMatch)
+        if (b) {
+            int subpixel = FC_RGBA_UNKNOWN;
+            FcPatternGetInteger(pattern, FC_RGBA, 0, &subpixel);
+            if (subpixel == FC_RGBA_UNKNOWN)
+                subpixel = FC_RGBA_NONE;
+                switch (subpixel) {
+                case FC_RGBA_NONE:
+                    ftRenderMode = FT_RENDER_MODE_NORMAL;
+                    break;
+                case FC_RGBA_RGB:
+                case FC_RGBA_BGR:
+                    ftRenderMode = FT_RENDER_MODE_LCD;
+                    horizontal = 1;
+                    break;
+                case FC_RGBA_VRGB:
+                case FC_RGBA_VBGR:
+                    ftRenderMode = FT_RENDER_MODE_LCD_V;
+                    horizontal = 0;
+                    break;
+                default:
+                    break;
+                }
+            } else {
+                ftRenderMode = FT_RENDER_MODE_NORMAL;
+            }
+
+    // loading mode:
+    if (aaType == TEXT_AA_OFF)
+        ftLoadFalgs |= FT_LOAD_TARGET_MONO;
+    else {
+        int hint_style = FC_HINT_NONE;
+        FcPatternGetInteger(pattern, FC_HINT_STYLE, 0, &hint_style);
+        switch (hint_style) {
+        case FC_HINT_NONE:
+            ftLoadFalgs |= FT_LOAD_NO_HINTING;
+            break;
+        case FC_HINT_SLIGHT:
+            ftLoadFalgs |= FT_LOAD_TARGET_LIGHT;
+            break;
+        case FC_HINT_MEDIUM:
+            ftLoadFalgs |= FT_LOAD_TARGET_NORMAL;
+            break;
+        case FC_HINT_FULL:
+            if (aaType == TEXT_AA_ON)
+                ftLoadFalgs |= FT_LOAD_TARGET_NORMAL;
+            else
+                ftLoadFalgs |= horizontal ? FT_LOAD_TARGET_LCD : FT_LOAD_TARGET_LCD_V;
+            break;
+        default:
+            // what else to use as default?
+            ftLoadFalgs |= FT_LOAD_TARGET_NORMAL;
+            break;
+        }
+    }
+
+    // autohinting:
+    if (FcPatternGetBool(pattern, FC_AUTOHINT, 0, &b) == FcResultMatch)
+        if (b)
+            ftLoadFalgs |= FT_LOAD_FORCE_AUTOHINT;
+
+    // LCD filter:
+    int filter = FC_LCD_DEFAULT;
+    FcPatternGetInteger(pattern, FC_LCD_FILTER, 0, &filter);
+    switch (filter) {
+    case FC_LCD_NONE:
+        ftLcdFilter = FT_LCD_FILTER_NONE;
+        break;
+    case FC_LCD_DEFAULT:
+        ftLcdFilter = FT_LCD_FILTER_DEFAULT;
+        break;
+    case FC_LCD_LIGHT:
+        ftLcdFilter = FT_LCD_FILTER_LIGHT;
+        break;
+    case FC_LCD_LEGACY:
+        ftLcdFilter = FT_LCD_FILTER_LEGACY;
+        break;
+    default:
+        // new unknown lcd filter type?! will use default one:
+        ftLcdFilter = FT_LCD_FILTER_DEFAULT;
+        break;
+    }
+
+    FcPatternDestroy(pattern);
+
+    rp->ftRenderMode = ftRenderMode;
+    rp->ftLoadFlags = ftLoadFalgs;
+    rp->ftLcdFilter = ftLcdFilter;
+}
+#endif

 /*
  * Class:     sun_font_FreetypeFontScaler
@@ -691,7 +839,9 @@ Java_sun_font_FreetypeFontScaler_getGlyp
     UInt16 width, height;
     GlyphInfo *glyphInfo;
     int glyph_index;
+#ifndef INFINALITY
     int renderFlags = FT_LOAD_RENDER, target;
+#endif
     FT_GlyphSlot ftglyph;

     FTScalerContext* context =
@@ -709,5 +859,10 @@ Java_sun_font_FreetypeFontScaler_getGlyp
         return ptr_to_jlong(getNullGlyphImage());
     }

+#ifdef INFINALITY
+    RenderingProperties renderingProperties;
+    readFontconfig((const FcChar8 *) scalerInfo->face->family_name,
+                   context->ptsz, context->aaType, &renderingProperties);
+#else
     if (!context->useSbits) {
          renderFlags |= FT_LOAD_NO_BITMAP;
@@ -731,10 +886,17 @@ Java_sun_font_FreetypeFontScaler_getGlyp
         target = FT_LOAD_TARGET_LCD_V;
     }
     renderFlags |= target;
+#endif

     glyph_index = FT_Get_Char_Index(scalerInfo->face, glyphCode);

+#ifdef INFINALITY
+    FT_Library_SetLcdFilter(scalerInfo->library, renderingProperties.ftLcdFilter);
+    error = FT_Load_Glyph(scalerInfo->face, glyphCode, renderingProperties.ftLoadFlags);
+#else
     error = FT_Load_Glyph(scalerInfo->face, glyphCode, renderFlags);
+#endif
+
     if (error) {
         //do not destroy scaler yet.
         //this can be problem of particular context (e.g. with bad transform)
@@ -753,9 +915,13 @@ Java_sun_font_FreetypeFontScaler_getGlyp

     /* generate bitmap if it is not done yet
      e.g. if algorithmic styling is performed and style was added to outline */
+#ifdef INFINALITY
+    FT_Render_Glyph(ftglyph, renderingProperties.ftRenderMode);
+#else
     if (ftglyph->format == FT_GLYPH_FORMAT_OUTLINE) {
         FT_Render_Glyph(ftglyph, FT_LOAD_TARGET_MODE(target));
     }
+#endif

     width  = (UInt16) ftglyph->bitmap.width;
     height = (UInt16) ftglyph->bitmap.rows;
@@ -969,7 +1135,9 @@ Java_sun_font_FreetypeFontScaler_getGlyp
 static FT_Outline* getFTOutline(JNIEnv* env, jobject font2D,
         FTScalerContext *context, FTScalerInfo* scalerInfo,
         jint glyphCode, jfloat xpos, jfloat ypos) {
+#ifndef INFINALITY
     int renderFlags;
+#endif
     int glyph_index;
     FT_Error error;
     FT_GlyphSlot ftglyph;
@@ -984,11 +1152,22 @@ static FT_Outline* getFTOutline(JNIEnv*
         return NULL;
     }

+#ifdef INFINALITY
+    RenderingProperties renderingProperties;
+    readFontconfig((const FcChar8 *) scalerInfo->face->family_name,
+                   context->ptsz, context->aaType, &renderingProperties);
+#else
     renderFlags = FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP;
+#endif

     glyph_index = FT_Get_Char_Index(scalerInfo->face, glyphCode);

+#ifdef INFINALITY
+    error = FT_Load_Glyph(scalerInfo->face, glyphCode, renderingProperties.ftLoadFlags);
+#else
     error = FT_Load_Glyph(scalerInfo->face, glyphCode, renderFlags);
+#endif
+
     if (error) {
         return NULL;
     }